public class SuppliedParameterReference extends Expression
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
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SuppliedParameterReference(int slot)
Constructor
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| Modifier and Type | Method and Description |
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int |
computeCardinality()
Get the static cardinality
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Expression |
copy()
Copy an expression.
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Item |
evaluateItem(XPathContext context)
Evaluate an expression as a single item.
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Sequence |
evaluateVariable(XPathContext c)
Get the value of this expression in a given context.
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void |
explain(ExpressionPresenter destination)
Diagnostic print of expression structure.
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ExpressionCompiler |
getExpressionCompiler()
Return the compiler of the SuppliedParameterReference expression
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int |
getIntrinsicDependencies()
Determine the intrinsic dependencies of an expression, that is, those which are not derived
from the dependencies of its subexpressions.
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ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the expression, if possible.
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int |
getSlotNumber()
Get the slot number
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SequenceIterator |
iterate(XPathContext context)
Get the value of this expression in a given context.
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Expression |
optimize(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Perform optimisation of an expression and its subexpressions.
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void |
setSuppliedType(SequenceType type)
Set the type of the supplied value if known
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String |
toString()
The toString() method for an expression attempts to give a representation of the expression
in an XPath-like form, but there is no guarantee that the syntax will actually be true XPath.
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Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Perform type checking of an expression and its subexpressions.
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addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeSpecialProperties, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getExpressionName, getHostLanguage, getImplementationMethod, getIntegerBounds, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getStreamability, getStreamingAdjunct, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterateEvents, iterateSubExpressionInfo, iterateSubExpressions, markTailFunctionCalls, process, promote, replaceSubExpression, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, simplify, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, typeErrorpublic SuppliedParameterReference(int slot)
slot - identifies this parameter. The value -1 indicates that the value is to be obtained
from the dynamic stack held in the context object.public int getSlotNumber()
public void setSuppliedType(SequenceType type)
type - of the supplied valuepublic Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
ExpressionThis checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion. A static type error is reported only if execution cannot possibly succeed, that is, if a run-time type error is inevitable. The call may return a modified form of the expression.
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable. However, the types of such functions and variables may not be accurately known if they have not been explicitly declared.
If the implementation returns a value other than "this", then it is required to ensure that the location information in the returned expression have been set up correctly. It should not rely on the caller to do this, although for historical reasons many callers do so.
typeCheck in class Expressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public Expression optimize(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
ExpressionThis method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.
optimize in class Expressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public ItemType getItemType(TypeHierarchy th)
getItemType in class Expressionth - the type hierarchy cachepublic int getIntrinsicDependencies()
getIntrinsicDependencies in class Expressionpublic int computeCardinality()
computeCardinality in class Expressionpublic Expression copy()
copy in class Expressionpublic Sequence evaluateVariable(XPathContext c) throws XPathException
c - the XPathContext which contains the relevant variable bindingsXPathException - if the variable is undefinedpublic SequenceIterator iterate(XPathContext context) throws XPathException
iterate in class Expressioncontext - the XPathContext which contains the relevant variable bindingsXPathException - if the variable is undefinedpublic Item evaluateItem(XPathContext context) throws XPathException
evaluateItem in class Expressioncontext - The context in which the expression is to be evaluatedXPathException - if any dynamic error occurs evaluating the
expressionpublic ExpressionCompiler getExpressionCompiler()
getExpressionCompiler in class Expressionpublic void explain(ExpressionPresenter destination)
explain in class Expressiondestination - the expression presenter used to display the structurepublic String toString()
toString in class ExpressionCopyright (c) 2004-2013 Saxonica Limited. All rights reserved.